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Trouble with transfer function in WIA C#

I have a problem with the below code. I want to scan a document by clicking a button in a WinForms C# application.
I use WIA, Visual studio and the scanner Fujitsu N7100A working with Windows 8. I am following a tutorial online for using WIA.
But the program doesn't run as expected. It seems to break down at the Transfer method.
// Create a DeviceManager instance
var deviceManager = new DeviceManager();
// Create an empty variable to store the scanner instance
DeviceInfo firstScannerAvailable = null;
// Loop through the list of devices to choose the first available
AddLogs(deviceManager.DeviceInfos.Count.ToString(), filename);
foreach (DeviceInfo d in deviceManager.DeviceInfos)
{
if (d.Type == WiaDeviceType.ScannerDeviceType)
{
firstScannerAvailable = d;
}
}
// Connect to the first available scanner
var device = firstScannerAvailable.Connect();
// Select the scanner
var scannerItem = device.Items[0];
// Retrieve a image in JPEG format and store it into a variable
var imageFile = (ImageFile)scannerItem.Transfer(FormatID.wiaFormatPNG);
//Save the image in some path with filename
var path = #"C:\Documents\scan.png";
if (File.Exists(path))
{
File.Delete(path);
}
// Save image !
imageFile.SaveFile(path);
I just have to remove the addition of lines in the file of log.

This is much more of a workaround since i have no idea about your scanner.
I would assume that all scanners has a drive where they store their scanned documents, like mine, So i would suggest that you read all available drives loop through them check for DriveType and VolumeLabel and then read it's files and copy the document where you want
Something like this :
foreach (var item in DriveInfo.GetDrives())
{
//VolumeLabel differs from a scanner to another
if (item.VolumeLabel == "Photo scan" && item.DriveType == DriveType.Removable)
{
foreach (var obj in Directory.GetFiles(item.Name))
{
File.Copy(obj, "[YOUR NEW PATH]");
break;
}
break;
}
}

Finaly a TWAIN application work with this scanner. I will work with that. I don't said why do that work with TWAIN and not with WIA but that the reality. Sorry for this waste of time. Thank you for the answers. Have a nice day.

I am currently solving this very problem. It seems the N7100A driver sets the Pages property of the device to 0, which should mean continous scanning, but the transfer method is unable to handle this value. You must set that property to 1:
var pages = 1;
// Not all devices have this property, but Fujitsu N7100A has.
device.Properties["Pages"]?.set_Value(ref pages);

I think the problem is here
var scannerItem = device.Items[0];
as WIA indexes are NOT zero based so it should be 1 instead
var scannerItem = device.Items[1];

Should I refactor these nested foreach statements?

I have some functions that allow a user to search through multiple directories for files of a certain type, and then just the path of those files is added to a listbox. Right now it's done through some nested foreach statements. It's going to be retrieving hundreds of thousands of filepaths, so I was curious what other efficient ways there would be to go about this?
Also, I know it sounds dumb to add that many items to a listbox. I'm only doing what I was told to do. I have a feeling in the future it will be asked to get rid of, but the filepaths will still have to be stored in a list somewhere.
Note: I'm using the WindowsAPICodePack to get a dialogue box that allows multiple directory selection.
List<string> selectedDirectories = new List<string>();
/// <summary>
/// Adds the paths of the directories chosen by the user into a list
/// </summary>
public void AddFilesToList()
{
selectedDirectories.Clear(); //make sure list is empty
var dlg = new CommonOpenFileDialog();
dlg.IsFolderPicker = true;
dlg.AddToMostRecentlyUsedList = false;
dlg.AllowNonFileSystemItems = false;
dlg.EnsureFileExists = true;
dlg.EnsurePathExists = true;
dlg.EnsureReadOnly = false;
dlg.EnsureValidNames = true;
dlg.Multiselect = true;
dlg.ShowPlacesList = true;
if (dlg.ShowDialog() == CommonFileDialogResult.Ok)
{
selectedDirectories = dlg.FileNames.ToList(); //add paths of selected directories to list
}
}
/// <summary>
/// Populates a listbox with all the filepaths of the selected type of file the user has chosen
/// </summary>
public void PopulateListBox()
{
foreach (string directoryPath in selectedDirectories) //for each directory in list
{
foreach (string ext in (dynamic)ImageCB.SelectedValue) //for each file type selected in dropdown
{
foreach (string imagePath in Directory.GetFiles(directoryPath, ext, SearchOption.AllDirectories)) //for each file in specified directory w/ specified format(s)
{
ListBox1.Items.Add(imagePath); //add file path to listbox
}
}
}
}
Edit: Not sure if it makes a difference, but I'm using the WPF listbox, not winforms.

One way to begin refactoring this outside of learning Linq would be to use the AddRange method. A good explanation as to its performance advantages over a for loop:
https://stackoverflow.com/a/9836512/4846465
There's probably no one answer to this question however.
foreach (var directoryPath in selectedDirectories)
{
foreach (string ext in (dynamic)ImageCB)
{
ListBox1.Items.AddRange(Directory.GetFiles(directoryPath, ext, SearchOption.AllDirectories).ToArray());
}
}

You can refactor it, or you can leave it how it is.
If you refactor it;
Your code will be more readable, understandable and reusable.
You need to write just a couple methods.
And your methods can be usable for another things like your current method.
And works.
If you leave it how it is;
Your code works. But hard to understand and read. Hard to debug in case of bug.
But works.

Adobe acrobat reader registry key location keeps changing

My requirement is to read a particular registry key related to Adobe acrobat reader and take a decision based on the value of that key.
Though this seems straightforward like I need to query the key using Registry class (for .NET)
and then take a decision based on the value.
However, the issue i face now is that, the registry key location keeps changing in almost every new version of Adobe Acrobat Reader.
All I can think of now is to have a switch case to handle for all the different Adobe versions in my code.
RegistryKey adobe = Registry.LocalMachine.OpenSubKey("Software").OpenSubKey("Adobe");
if (adobe != null)
{
RegistryKey acroRead = adobe.OpenSubKey("Acrobat Reader");
if (acroRead != null)
{
string[] acroReadVersions = acroRead.GetSubKeyNames();
Console.WriteLine("The following version(s) of Acrobat Reader are installed: ");
foreach (string versionNumber in acroReadVersions)
{
switch(versionNumber)
{
case 1.x = //do something;
//break;
case 2.x = //do something;
//break;
case 6.x = //do something;
//break;
case 9.x = //do something;
//break;
}
}
}
}
But some im not satisfied with this approach. Every time Adobe releases a new version i have to make sure i have to handle it differently. Any suggestions for a better approach.
Thanks

you best hope is to open the registry key containing the version numbers, then enumerate each sub key, possibly validating it looks like a version number, then look in each of those subkeys for the thing that you want. You might want to only use the highest number version that you find.
Obviously this will only work if what you want is always contained in the same registry entry relative to the version key, or always in the same named entry (and you would then have to enumerate every element under the sub key looking for the thing you want).
if the thing you want changes name and location in every release then you will have a problem, unless you can somehow recognize it from the data, in which case enumerate every element and look at the4 data and try to decide if it is what you want, but this approach is likely to be fraught with danger or false positives.

Well, I have the exact same problem and since I know Adobe is not so brilliant in their decisions and makings, I think I will try this approach:
public static string AcrobatReaderPath
{
get
{
var paths = new List<string>()
{
Registry.GetValue(#"HKEY_CLASSES_ROOT\Software\Adobe\Acrobat\Exe", "", #"C:\Program Files (x86)\Adobe\Reader 10.0\Reader\AcroRd32.exe") as string
};
var files = Directory.GetFileSystemEntries(#"C:\Program Files (x86)\Adobe\", #"*Acr*R*d*32.exe", SearchOption.AllDirectories);
paths.AddRange(files);
foreach(var path in paths) if (File.Exists(path)) return path;
return "";
}
}
My registry has nothing related to Acrobat at :
HKEY_LOCAL_MACHINE\SOFTWARE\Adobe\
..so it seems Adobe is moving their registry keys all over the registry with time passing...
I just hope they will avoid moving Acrobat itself outside the Program Files folder in the future... (you never know with these people...)

I think you can apply following logic:
adobe file associations are kept in registry - you can read them under
HKEY_CLASSES_ROOT \ .pdf \ OpenWithList
Those subkeys are app names (if any):
Acrobat.exe
AcroRD32.exe
etc.
Use them to combine and read keys (either Open or Read should be present)
HKEY_CLASSES_ROOT\Applications\XXXX\shell\Open\command
HKEY_CLASSES_ROOT\Applications\XXXX\shell\Read\command
If present, they would be similar to
"C:\Program Files (x86)\Adobe\Acrobat 7.0\Acrobat\Acrobat.exe" "%1"
from where you can strip %1 and get adobe app path.
Here is C# code:
private void AddShellCommandDefault(List<string> lst, RegistryKey shell, string reg KeyOpenRead)
{
var shellOpen = shell.OpenSubKey(regKeyOpenRead);
if (shellOpen == null) return;
var shellOpenCommand = shellOpen.OpenSubKey("command");
if (shellOpenCommand == null) return;
var defaultVal = shellOpenCommand.GetValue(null);
if (defaultVal == null) return;
int kex = defaultVal.ToString().LastIndexOf(".exe", StringComparison.OrdinalIgnoreCase);
if (kex < 0) return;
lst.Add(defaultVal.ToString().Substring(0, kex).Replace("\"", "") + ".exe");
}
public List<string> GetAdobeApps()
{
var addobeList = new List<string>();
// HKEY_CLASSES_ROOT\.pdf\OpenWithList\Acrobat.exe
// HKEY_CLASSES_ROOT\Applications\Acrobat.exe\shell\Open\command
// default "C:\Program Files (x86)\Adobe\Acrobat 7.0\Acrobat\Acrobat.exe" "%1"
var adobe = Registry.ClassesRoot.OpenSubKey(".pdf");
if (adobe == null) return addobeList;
var openWith = adobe.OpenSubKey("OpenWithList");
if (openWith == null) return addobeList;
var apps = Registry.ClassesRoot.OpenSubKey("Applications");
if (apps == null) return addobeList;
foreach (string sLong in openWith.GetSubKeyNames())
{
string s = sLong.Split(#"\/".ToCharArray()).Last();
var adobeApp = apps.OpenSubKey(s);
if (adobeApp == null) continue;
var shell = adobeApp.OpenSubKey("shell");
if (shell == null) continue;
AddShellCommandDefault(addobeList, shell, "Read");
AddShellCommandDefault(addobeList, shell, "Open");
}
return addobeList;
}
When run GetAdobeApps, it returns collection similar to
Count = 2
[0]: "C:\\Program Files (x86)\\Adobe\\Acrobat 7.0\\Acrobat\\Acrobat.exe"
[1]: "C:\\Program Files (x86)\\Adobe\\Reader 9.0\\Reader\\AcroRd32.exe"

Single-assembly multi-language Windows Forms deployment (ILMerge and satellite assemblies / localization) - possible?

I have a simple Windows Forms (C#, .NET 2.0) application, built with Visual Studio 2008.
I would like to support multiple UI languages, and using the "Localizable" property of the form, and culture-specific .resx files, the localization aspect works seamlessly and easily. Visual Studio automatically compiles the culture-specific resx files into satellite assemblies, so in my compiled application folder there are culture-specific subfolders containing these satellite assemblies.
I would like to have the application be deployed (copied into place) as a single assembly, and yet retain the ability to contain multiple sets of culture-specific resources.
Using ILMerge (or ILRepack), I can merge the satellite assemblies into the main executable assembly, but the standard .NET ResourceManager fallback mechanisms do not find the culture-specific resources that were compiled into the main assembly.
Interestingly, if I take my merged (executable) assembly and place copies of it into the culture-specific subfolders, then everything works! Similarly, I can see the main and culture-specific resources in the merged assemby when I use Reflector (or ILSpy). But copying the main assembly into culture-specific subfolders defeats the purpose of the merging anyway - I really need there to be just a single copy of the single assembly...
I'm wondering whether there is any way to hijack or influence the ResourceManager fallback mechanisms to look for the culture-specific resources in the same assembly rather than in the GAC and culture-named subfolders. I see the fallback mechanism described in the following articles, but no clue as to how it would be modified: BCL Team Blog Article on ResourceManager.
Does anyone have any idea? This seems to be a relatively frequent question online (for example, another question here on Stack Overflow: "ILMerge and localized resource assemblies"), but I have not found any authoritative answer anywhere.
UPDATE 1: Basic Solution
Following casperOne's recommendation below, I was finally able to make this work.
I'm putting the solution code here in the question because casperOne provided the only answer, I don't want to add my own.
I was able to get it to work by pulling the guts out of the Framework resource-finding fallback mechanisms implemented in the "InternalGetResourceSet" method and making our same-assembly search the first mechanism used. If the resource is not found in the current assembly, then we call the base method to initiate the default search mechanisms (thanks to #Wouter's comment below).
To do this, I derived the "ComponentResourceManager" class, and overrode just one method (and re-implemented a private framework method):
class SingleAssemblyComponentResourceManager :
System.ComponentModel.ComponentResourceManager
{
private Type _contextTypeInfo;
private CultureInfo _neutralResourcesCulture;
public SingleAssemblyComponentResourceManager(Type t)
: base(t)
{
_contextTypeInfo = t;
}
protected override ResourceSet InternalGetResourceSet(CultureInfo culture,
bool createIfNotExists, bool tryParents)
{
ResourceSet rs = (ResourceSet)this.ResourceSets[culture];
if (rs == null)
{
Stream store = null;
string resourceFileName = null;
//lazy-load default language (without caring about duplicate assignment in race conditions, no harm done);
if (this._neutralResourcesCulture == null)
{
this._neutralResourcesCulture =
GetNeutralResourcesLanguage(this.MainAssembly);
}
// if we're asking for the default language, then ask for the
// invariant (non-specific) resources.
if (_neutralResourcesCulture.Equals(culture))
culture = CultureInfo.InvariantCulture;
resourceFileName = GetResourceFileName(culture);
store = this.MainAssembly.GetManifestResourceStream(
this._contextTypeInfo, resourceFileName);
//If we found the appropriate resources in the local assembly
if (store != null)
{
rs = new ResourceSet(store);
//save for later.
AddResourceSet(this.ResourceSets, culture, ref rs);
}
else
{
rs = base.InternalGetResourceSet(culture, createIfNotExists, tryParents);
}
}
return rs;
}
//private method in framework, had to be re-specified here.
private static void AddResourceSet(Hashtable localResourceSets,
CultureInfo culture, ref ResourceSet rs)
{
lock (localResourceSets)
{
ResourceSet objA = (ResourceSet)localResourceSets[culture];
if (objA != null)
{
if (!object.Equals(objA, rs))
{
rs.Dispose();
rs = objA;
}
}
else
{
localResourceSets.Add(culture, rs);
}
}
}
}
To actually use this class, you need to replace the System.ComponentModel.ComponentResourceManager in the "XXX.Designer.cs" files created by Visual Studio - and you will need to do this every time you change the designed form - Visual Studio replaces that code automatically. (The problem was discussed in "Customize Windows Forms Designer to use MyResourceManager", I did not find a more elegant solution - I use fart.exe in a pre-build step to auto-replace.)
UPDATE 2: Another Practical Consideration - more than 2 languages
At the time I reported the solution above, I was actually only supporting two languages, and ILMerge was doing a fine job of merging my satellite assembly into the final merged assembly.
Recently I started working on a similar project where there are multiple secondary languages, and therefore multiple satellite assemblies, and ILMerge was doing something very strange: Instead of merging the multiple satellite assemblies I had requested, it was merging the first satellite assembly in multiple times!
eg command-line:
"c:\Program Files\Microsoft\ILMerge\ILMerge.exe" /t:exe /out:%1SomeFinalProg.exe %1InputProg.exe %1es\InputProg.resources.dll %1fr\InputProg.resources.dll
With that command-line, I was getting the following sets of resources in the merged assembly (observed with ILSpy decompiler):
InputProg.resources
InputProg.es.resources
InputProg.es.resources <-- Duplicated!
After some playing around, I ended up realizing this is just a bug in ILMerge when it encounters multiple files with the same name in a single command-line call. The solution is simply to merge each satellite assembly in a different command-line call:
"c:\Program Files\Microsoft\ILMerge\ILMerge.exe" /t:exe /out:%1TempProg.exe %1InputProg.exe %1es\InputProg.resources.dll
"c:\Program Files\Microsoft\ILMerge\ILMerge.exe" /t:exe /out:%1SomeFinalProg.exe %1TempProg.exe %1fr\InputProg.resources.dll
When I do this, the resulting resources in the final assembly are correct:
InputProg.resources
InputProg.es.resources
InputProg.fr.resources
So finally, in case this helps clarify, here's a complete post-build batch file:
"%ProgramFiles%\Microsoft\ILMerge\ILMerge.exe" /t:exe /out:%1TempProg.exe %1InputProg.exe %1es\InputProg.resources.dll
IF %ERRORLEVEL% NEQ 0 GOTO END
"%ProgramFiles%\Microsoft\ILMerge\ILMerge.exe" /t:exe /out:%1SomeFinalProg.exe %1TempProg.exe %1fr\InputProg.resources.dll
IF %ERRORLEVEL% NEQ 0 GOTO END
del %1InputProg.exe
del %1InputProg.pdb
del %1TempProg.exe
del %1TempProg.pdb
del %1es\*.* /Q
del %1fr\*.* /Q
:END
UPDATE 3: ILRepack
Another quick note - One of the things that bothered me with ILMerge was that it is an additional proprietary Microsoft tool, not installed by default with Visual Studio, and therefore an extra dependency that makes it that little bit harder for a third party to get started with my open-source projects.
I recently discovered ILRepack, an open-source (Apache 2.0) equivalent that so far works just as well for me (drop-in replacement), and can be freely distributed with your project sources.
I hope this helps someone out there!

The only way I can see this working is by creating a class that derives from ResourceManager and then overriding the InternalGetResourceSet and GetResourceFileName methods. From there, you should be able to override where resources are obtained, given a CultureInfo instance.

A different approach:
1) add your resource.DLLs as embededed resources in your project.
2) add an event handler for AppDomain.CurrentDomain.ResourceResolve
This handler will fire when a resource cannot be found.
internal static System.Reflection.Assembly CurrentDomain_ResourceResolve(object sender, ResolveEventArgs args)
{
try
{
if (args.Name.StartsWith("your.resource.namespace"))
{
return LoadResourcesAssyFromResource(System.Threading.Thread.CurrentThread.CurrentUICulture, "name of your the resource that contains dll");
}
return null;
}
catch (Exception ex)
{
return null;
}
}
3) Now you have to implement LoadResourceAssyFromResource something like
private Assembly LoadResourceAssyFromResource( Culture culture, ResourceName resName)
{
//var x = Assembly.GetExecutingAssembly().GetManifestResourceNames();
using (var stream = Assembly.GetExecutingAssembly().GetManifestResourceStream(resName))
{
if (stream == null)
{
//throw new Exception("Could not find resource: " + resourceName);
return null;
}
Byte[] assemblyData = new Byte[stream.Length];
stream.Read(assemblyData, 0, assemblyData.Length);
var ass = Assembly.Load(assemblyData);
return ass;
}
}

Posted as answer since comments didn't provide enough space:
I couldn't find resources for neutral cultures (en instead of en-US) with the OPs solution. So I extended InternalGetResourceSet with a lookup for neutral cultures which did the job for me. With this you can now also locate resources which do not define the region. This is actually the same behaviour that the normal resourceformatter will show when not ILMerging the resource files.
//Try looking for the neutral culture if the specific culture was not found
if (store == null && !culture.IsNeutralCulture)
{
resourceFileName = GetResourceFileName(culture.Parent);
store = this.MainAssembly.GetManifestResourceStream(
this._contextTypeInfo, resourceFileName);
}
This results in the following code for the SingleAssemblyComponentResourceManager
class SingleAssemblyComponentResourceManager :
System.ComponentModel.ComponentResourceManager
{
private Type _contextTypeInfo;
private CultureInfo _neutralResourcesCulture;
public SingleAssemblyComponentResourceManager(Type t)
: base(t)
{
_contextTypeInfo = t;
}
protected override ResourceSet InternalGetResourceSet(CultureInfo culture,
bool createIfNotExists, bool tryParents)
{
ResourceSet rs = (ResourceSet)this.ResourceSets[culture];
if (rs == null)
{
Stream store = null;
string resourceFileName = null;
//lazy-load default language (without caring about duplicate assignment in race conditions, no harm done);
if (this._neutralResourcesCulture == null)
{
this._neutralResourcesCulture =
GetNeutralResourcesLanguage(this.MainAssembly);
}
// if we're asking for the default language, then ask for the
// invariant (non-specific) resources.
if (_neutralResourcesCulture.Equals(culture))
culture = CultureInfo.InvariantCulture;
resourceFileName = GetResourceFileName(culture);
store = this.MainAssembly.GetManifestResourceStream(
this._contextTypeInfo, resourceFileName);
//Try looking for the neutral culture if the specific culture was not found
if (store == null && !culture.IsNeutralCulture)
{
resourceFileName = GetResourceFileName(culture.Parent);
store = this.MainAssembly.GetManifestResourceStream(
this._contextTypeInfo, resourceFileName);
}
//If we found the appropriate resources in the local assembly
if (store != null)
{
rs = new ResourceSet(store);
//save for later.
AddResourceSet(this.ResourceSets, culture, ref rs);
}
else
{
rs = base.InternalGetResourceSet(culture, createIfNotExists, tryParents);
}
}
return rs;
}
//private method in framework, had to be re-specified here.
private static void AddResourceSet(Hashtable localResourceSets,
CultureInfo culture, ref ResourceSet rs)
{
lock (localResourceSets)
{
ResourceSet objA = (ResourceSet)localResourceSets[culture];
if (objA != null)
{
if (!object.Equals(objA, rs))
{
rs.Dispose();
rs = objA;
}
}
else
{
localResourceSets.Add(culture, rs);
}
}
}
}

I have a suggestion for part of your problem. Specifically, a solution to the step of updating .Designer.cs files to replace ComponentResourceManager with SingleAssemblyComponentResourceManager.
Move the InitializeComponent() method out of .Designer.cs and into the implementation file (include the #region). Visual Studio will continue to auto generate that section, with no problems as far as I can tell.
Use a C# alias at the top of the implementation file so that ComponentResourceManager is aliased to SingleAssemblyComponentResourceManager.
Unfortunately, I didn't get to test this fully. We found a different solution to our problem and so moved on. I hope it helps you though.

Just a thought.
You did the step and created your SingleAssemblyComponentResourceManager
So why do you take the pain to include your satellite assemblies in the ilmerged Assembly?
You could add the ResourceName.es.resx itself as a binary file to another resource in your project.
Than you could rewrite your code
store = this.MainAssembly.GetManifestResourceStream(
this._contextTypeInfo, resourceFileName);
//If we found the appropriate resources in the local assembly
if (store != null)
{
rs = new ResourceSet(store);
with this code (not tested but should work)
// we expect the "main" resource file to have a binary resource
// with name of the local (linked at compile time of course)
// which points to the localized resource
var content = Properties.Resources.ResourceManager.GetObject("es");
if (content != null)
{
using (var stream = new MemoryStream(content))
using (var reader = new ResourceReader(stream))
{
rs = new ResourceSet(reader);
}
}
This should render the effort to include the sattelite assembiles in the ilmerge process obsolete.

How to get latest revision number from SharpSVN?

How to get latest revision number using SharpSVN?

The least expensive way to retrieve the head revision from a repository
is the Info command.
using(SvnClient client = new SvnClient())
{
SvnInfoEventArgs info;
Uri repos = new Uri("http://my.server/svn/repos");
client.GetInfo(repos, out info);
Console.WriteLine(string.Format("The last revision of {0} is {1}", repos, info.Revision));
}

I am checking the latest version of the working copy using SvnWorkingCopyClient:
var workingCopyClient = new SvnWorkingCopyClient();
SvnWorkingCopyVersion version;
workingCopyClient.GetVersion(workingFolder, out version);
The latest version of the local working repository is then available through
long localRev = version.End;
For a remote repository, use
var client = new SvnClient();
SvnInfoEventArgs info;
client.GetInfo(targetUri, out info);
long remoteRev = info.Revision;
instead.
This is similar to using the svnversion tool from the command line. Hope this helps.

Ok, I figured it by myself:
SvnInfoEventArgs statuses;
client.GetInfo("svn://repo.address", out statuses);
int LastRevision = statuses.LastChangeRevision;

i googled also a lot but the only one thing which was working for me to get really the last revision was:
public static long GetRevision(String target)
{
SvnClient client = new SvnClient();
//SvnInfoEventArgs info;
//client.GetInfo(SvnTarget.FromString(target), out info); //Specify the repository root as Uri
//return info.Revision
//return info.LastChangeRevision
Collection<SvnLogEventArgs> info = new Collection<SvnLogEventArgs>();
client.GetLog(target, out info);
return info[0].Revision;
}
the other solutions are commented out. Try by yourself and see the difference . . .

Well, a quick google search gave me that, and it works (just point at the /trunk/ URI):
http://sharpsvn.open.collab.net/ds/viewMessage.do?dsForumId=728&dsMessageId=89318

This is a very old question, and it has been answered well in the top two answers. Still, in the hopes it might be of some help to someone I'm posting the following C# method to illustrate how to not only get the revision numbers from both the repository and the working copy, but also how to test for typical situations that might be considered as problems, for example in an automated build process.
/// <summary>
/// Method to get the Subversion revision number for the top folder of the build collection,
/// assuming these files were checked-out from Merlinia's Subversion repository. This also
/// checks that the working copy is up-to-date. (This does require that a connection to the
/// Subversion repository is possible, and that it is running.)
///
/// One minor problem is that SharpSvn is available in 32-bit or 64-bit DLLs, so the program
/// needs to target one or the other platform, not "Any CPU".
///
/// On error an exception is thrown; caller must be prepared to catch it.
/// </summary>
/// <returns>Subversion repository revision number</returns>
private int GetSvnRevisionNumber()
{
try
{
// Get the latest revision number from the Subversion repository
SvnInfoEventArgs svnInfoEventArgs;
using (SvnClient svnClient = new SvnClient())
{
svnClient.GetInfo(new Uri("svn://99.99.99.99/Merlinia/Trunk"), out svnInfoEventArgs);
}
// Get the current revision numbers from the working copy that is the "build collection"
SvnWorkingCopyVersion svnWorkingCopyVersion;
using (SvnWorkingCopyClient svnWorkingCopyClient = new SvnWorkingCopyClient())
{
svnWorkingCopyClient.GetVersion(_collectionFolder, out svnWorkingCopyVersion);
}
// Check the build collection has not been modified since last commit or update
if (svnWorkingCopyVersion.Modified)
{
throw new MerliniaException(0x3af34e1u,
"Build collection has been modified since last repository commit or update.");
}
// Check the build collection is up-to-date relative to the repository
if (svnInfoEventArgs.Revision != svnWorkingCopyVersion.Start)
{
throw new MerliniaException(0x3af502eu,
"Build collection not up-to-date, its revisions = {0}-{1}, repository = {2}.",
svnWorkingCopyVersion.Start, svnWorkingCopyVersion.End, svnInfoEventArgs.Revision);
}
return (int)svnInfoEventArgs.Revision;
}
catch (Exception e)
{
_fLog.Error(0x3af242au, e);
throw;
}
}
(This code does include a couple of things specific for the program it was copied from, but that shouldn't make the SharpSvn parts difficult to understand.)